https://github.com/VirtualBox/virtualbox/issues/70#issuecomment-3233251540

Fix freeze with QT 6.9

--- a/src/VBox/Frontends/VirtualBox/src/globals/UITranslationEventListener.cpp
+++ b/src/VBox/Frontends/VirtualBox/src/globals/UITranslationEventListener.cpp
@@ -81,7 +81,8 @@
            && pEvent->type() == QEvent::LanguageChange
            && pObject == qApp)
     {
-        emit sigRetranslateUI();
+        /* Send translation signal asynchronously: */
+        QMetaObject::invokeMethod(this, "sltRetranslateUI", Qt::QueuedConnection);
     }
     /* Call to base-class: */
     return QObject::eventFilter(pObject, pEvent);
--- a/src/VBox/Frontends/VirtualBox/src/globals/UITranslationEventListener.h
+++ b/src/VBox/Frontends/VirtualBox/src/globals/UITranslationEventListener.h
@@ -55,6 +55,10 @@
 
     bool eventFilter(QObject *pObject, QEvent *pEvent) RT_OVERRIDE RT_FINAL;
 
+private slots:
+
+    void sltRetranslateUI() { emit sigRetranslateUI(); }
+
 private:
 
     UITranslationEventListener(QObject *pParent = 0);